Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Que usina de energia foi comissionada em 2008?
 ###Tabelas: CREATE TABLE wisconsin_counties_ranked_by_per_capita_income (wisconsin_counties_ranked_by_per_capita_income_id AUTO_INCREMENT PRIMARY KEY, County VARCHAR, Per capita income VARCHAR, Median household income VARCHAR, Median family income VARCHAR, Population INT, Number of households INT) CREATE TABLE top_league_table (top_league_table_id AUTO_INCREMENT PRIMARY KEY, Season VARCHAR, Order VARCHAR, Played INT, Drawn INT, Lost INT, Penalties INT, Points For INT, Points Against INT, Points Diff INT, Coach VARCHAR) CREATE TABLE davis_cup_and_federation_cup_venues (davis_cup_and_federation_cup_venues_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Stadium VARCHAR, Capacity INT, City VARCHAR, Country VARCHAR) CREATE TABLE hydro_power_stations (hydro_power_stations_id AUTO_INCREMENT PRIMARY KEY, S.no. INT, Power Plant VARCHAR, State VARCHAR, Commissioned Capacity (MW) INT, year of commission INT) CREATE TABLE club_statistics (club_statistics_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Season VARCHAR, Games VARCHAR, Goals VARCHAR, Assists VARCHAR, Points VARCHAR)  
SELECT Power Plant FROM hydro_power_stations WHERE year of commission = 2008